Roof assembly for a vehicle

ABSTRACT

A roof assembly for a vehicle comprises a stationary part for attaching the roof assembly to the vehicle&#39;s fixed roof. At least one closing element is movably supported by the stationary part and is capable of moving between a closed position within the roof opening and an open position in which the rear of the closing element is raised and the closing element is moved rearwardly. The closing element is provided with at least a retaining hook configured to hook behind a locking device on the stationary part in the closed position of the closing element to provide a mechanical lock for the closing element in upward direction. 
     The locking device is movable between a locking position and an unlocking position. The closing element is configured to actuate the locking device to move from the unlocked to the locked position when the closing element is moved to the closed position.

BACKGROUND

The discussion below is merely provided for general backgroundinformation and is not intended to be used as an aid in determining thescope of the claimed subject matter.

Aspects of the invention relate to a roof assembly for a vehicle havinga roof opening in a fixed roof portion, comprising: a stationary partfor attaching the roof assembly to the fixed roof portion, at least oneclosing element movably supported by the stationary part and beingcapable of moving between a closed position to close the roof openingand an open position in which the rear of the closing element is raisedand the closing element is moved rearwardly, the closing element beingprovided with at least a retaining hook configured to hook behind alocking device on the stationary part in the closed position of theclosing element to provide a mechanical lock for the closing element inupward direction.

Such roof assembly for a vehicle is known. The closing element thereofhas a retaining hook that engages below a fixed part of either the fixedroof portion or the stationary part of the roof assembly, which thusoperates as the locking device. Although this structure is very simple,it is not suited for all closing elements. Some closing elements movetowards the closed position within the roof opening with little forwardmovement, so that it is not possible to reliably engage below the fixedpart.

SUMMARY

This Summary and the Abstract herein are provided to introduce aselection of concepts in a simplified form that are further describedbelow in the Detailed Description. This Summary and the Abstract are notintended to identify key features or essential features of the claimedsubject matter, nor are they in-intended to be used as an aid indetermining the scope of the claimed subject matter. The claimed subjectmatter is not limited to implementations that solve any or alldisadvantages noted in the Background.

According to one aspect of the invention, the locking device is movablebetween a locking position and an unlocking position, the closingelement being configured to actuate the locking device to move from theunlocked to the locked position when the closing element is moved to theclosed position.

By providing a locking element that can be actuated such that it moveswith respect to the closing element, instead of the other way around,the movement of the closing element is not decisive for obtaining areliable lock against a vertical movement of the closing element in itsclosed position. Any movement of the closing element can be used toactuate the locking device. The locking device according to theinvention can be used both at the front and at the rear of the roofopening, as also a purely downward movement can be used to actuate oractivate the locking device.

If the retaining hook is positioned at the front of the closing element,and the locking device is positioned at the front of the roof opening,the closing element may be provided with an operating mechanism to moveit between open and closed positions, the operating mechanism beingconfigured to move the closing element to the closed position with adownward and slightly forward movement. In that case it is possible thatthe locking device is provided with an actuating element, a transmissionand a locking element, the locking element being connected to theactuating element through said transmission, said transmissionconverting a movement of the actuating element by the closing elementinto another movement of the locking element. Such embodiment would alsobe useful at the rear of the roof opening if the transmission converts adownward movement of the closing element into a substantially horizontalmovement of the locking element. Unlocking should then be done inanother way, for example electrically, or through the operatingmechanism, as an upward movement op the closing element cannot be usedto deactivate the locking element.

In an embodiment in which the locking device is used at the front of theroof opening, the locking element and the actuating element may bemovable substantially parallel to the forward movement of the closingelement, the transmission reversing the movement of the actuatingelement into a larger movement of the locking element.

In this manner, the small movement of the closing element is sufficientto create a larger movement of the locking element so as to obtain areliable lock of the closing element.

In one embodiment, the transmission includes a lever arrangement,wherein the actuating element is connected to a first lever arm and thelocking element is connected to a second lever arm that is longer thanthe first lever arm.

In this way it is possible to simply create a sufficiently largetransmission ratio.

In another embodiment, the locking device is shaped and movable to allowentrance of the retaining hook when moving downwardly and forwardly tothe closed position, but to prevent a vertical upward movement of theretaining hook in the closed position of the closing element.

In this embodiment, the locking effect is created by carefully designingthe locking device and retaining hook in dependence of the movement ofthe closing element, such that a particular movement with a horizontalcomponent (or a component parallel to guide rails) is allowed, but amovement without such component is prevented.

One way of obtaining this is by an embodiment in which the lockingdevice is pivotable around a substantially horizontal transverse axisand is preferably provided with a short upper leg and a long lower leg,the retaining hook of the closing element being shaped to hook below theupper leg and to engage the lower leg at a distance beyond the length ofthe upper leg, the locking device being slightly pivoted when theretaining hook enters the locking device.

Thus the engagement between the longer leg and the retaining hookprevents movement of the shorter leg when the retaining hook is movedupwardly, because movement of the longer leg is hindered by theretaining hook, which in turn is hindered by the shorter leg which movesless than the longer leg.

In a simple embodiment, the upper and lower legs extend substantiallyparallel at a distance sufficient to allow the retaining hook to enterthe space between the upper and lower legs.

To improve the reliability of the locking device, the locking devicecomprises a spring biasing the locking device to its unlocking position.In this way, the locking device will always be in the unlocking positionwhen the retaining hook arrives at the locking device.

In another embodiment, the locking device is an electrically actuatedlocking device, such as an electromagnetic lock having a locking latchconfigured to move and engage the retaining hook, the electromagneticlock having an actuating button which can be actuated by any part of theclosing element.

This embodiment is very versatile as the actuating button can be placedanywhere to cooperate with a part connected to the closing element,because there is no requirement for a mechanical connection.

Nonetheless, the retaining hook may be configured to actuate theactuating button of the electromagnetic lock, so that the locking devicecan be a single unit.

In a further embodiment, the retaining hook is positioned at the rear ofthe closing element, and the electromagnetic locking device beingpositioned at the rear of the roof opening.

Aspects of the invention also include a vehicle having the roof assemblyas described above.

BRIEF DESCRIPTION OF THE DRAWINGS

Further details and advantages follow from the below description of theaccompanying drawings showing embodiments of the roof assembly by way ofexample.

FIG. 1 is a schematic perspective view of a part of a vehicle having anembodiment of the roof assembly of the invention.

FIG. 2 is a view corresponding to that of FIG. 1 but showing a differentembodiment of the roof assembly having differently placed lockingdevices.

FIG. 3 is a very schematic cross-sectional view according to the lineIII-III in FIG. 1 and showing a locking device at the front of the roofopening.

FIG. 4 is a view corresponding to that of FIG. 3, but showing theclosing element close to its closed position.

FIG. 5 is a very schematic cross-sectional view according to the lineV-V in FIG. 1, showing a locking device at the rear of the roof opening.

FIG. 6 is a view corresponding to that of FIG. 5, but showing theclosing element close to its closed position.

FIG. 7 is a view corresponding to that of FIG. 3 but showing a furtherembodiment of the roof assembly.

FIGS. 8 and 9 are views corresponding to that of FIG. 7, but showing twoother positions of the closing element and locking device.

FIG. 10 is an exploded view of another embodiment of a locking devicefor the roof assembly.

FIGS. 11a-11d (collectively referred to as FIG. 11) are perspectiveviews of the locking device and retaining hook in four differentpositions close to the closed position of the closing element.

DETAILED DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENTS

The drawing, and in the first instance FIG. 1, shows a vehicle, such asa passenger car or utility vehicle, comprising a fixed roof portion 1,in which a roof opening 2 has been formed for the purpose ofaccommodating a roof assembly. The fixed roof portion 1 may be part ofthe vehicle or part of the roof assembly and replacing the normal roofof the vehicle. In this embodiment the roof assembly comprises a firstclosing element 3 and a second closing element 4 which may both be inthe form of a rigid panel, which may or may not be transparent, andwhich together close the roof opening 2 in their closed position andwhich can be opened from said closed position. The first closing elementor panel 3 can in any case be opened by moving the rear side of thepanel 3 upwardly and sliding the panel rearwardly over the second panel4. The second closing element 4 may also be comprised of a foldablecover, slats or the like, or may be a fixed panel, or just form part ofthe fixed roof portion 1. An operating mechanism schematicallyillustrated at 3 a on each side of the closing element 3 includescommonly cable operated slide mechanisms on guides with lift mechanismsto raise and lower the closing element 3. In particular, the slide andlift mechanisms include slides and/or levers to effectuate a downwardand slightly forward movement of the closing element 3 to the closedposition. Such operating mechanisms 3 a are well known in the art.

As mentioned, the roof opening 2, in this case extending longitudinallybetween the fixed roof portion 1 and the fixed second panel 4, can beexposed to a large extent by the first panel 3. When the panel 3 isclosed it will be moved from a venting position, in which its rear sideis up, downwardly, and the last movement to the closed position will beboth downward and slightly forward. At least on the front side, but inthis case also on the rear side, of the roof opening 2 there is provideda locking device 5 attached to the fixed roof portion 1 or to astationary roof part, such as a frame 6 to support the closing elementsand to fix the roof assembly to the fixed roof portion 1. In theembodiment shown, the locking device 5 is positioned in the centre ofthe front and rear side of the roof opening 2. FIG. 2 shows a variationin which two locking devices 5 are distributed along the front side ofthe roof opening 2. Other positions and numbers of locking devices 5 areconceivable.

The locking devices 5 are configured to cooperate with a retaining hook7 fixed to the panel 3. The function of the locking device is to preventunwanted upward movements of the panel 3 which may be caused by lowpressures above the panel 3 when the vehicle is driving at very highspeeds, for example more than 300 km/h.

FIGS. 3 and 4 show a first embodiment of the roof assembly. There areshown the fixed roof 1, the panel 3 carrying the retaining hook 7 andthe locking device 5 fixed on the frame 6, or to the fixed roof 1. Alsoshown is a seal 8 on the outer edge of the panel 3 cooperating with theedge of the roof opening 2. The retaining hook 7 comprises a hole 7 a ina metal reinforcement frame 9 (not shown here, see FIG. 7) of the panel3 and in encapsulating material 10 used to fix the reinforcement 9 tothe glass of the panel 3.

The locking device 5 is provided with a locking element in the form of alocking pin 11 capable of entering the hole 7 a of the retaining hook 7.The locking pin 11 is movable back and forth in a substantiallyhorizontal direction, or better substantially parallel to the fixed roof1 or panel 3 or any guiderails at this location (there will normally bea curve in these parts). The movement of the locking pin 11 iselectrically controlled, such as by an electromagnet, servomotor or thelike. This locking device 5 is actuated by the panel 3 arriving near itsclosed position, here by means of a proximity switch such as anactuating or push pin or button 12. This proximity switch 12 is engagedby the retaining hook 7 or another part of the panel 3. Only a smallmovement of the panel 3 in horizontal direction (or a component of themovement in horizontal direction) is needed to actuate the lockingdevice 5 so as to electrically move the locking pin 11 from theunlocking position to the locking position in which it is in engagementwith surface(s) of the hole 7 a of the retaining hook 7. A reversemovement of the locking pin 11 is effected when the panel 3 is movedagain from the closed position towards the open position.

FIG. 5 shows a second locking device 5 which is positioned at the rearside of the roof opening, here at the front side of the second (fixed)panel 4. This locking device 5 is similar to that on the front sideexcept for the proximity switch 12 which is extending and movable insubstantially vertical direction. The locking pin 11 of this rearlocking device is actuated by the proximity switch 12 which iscontrolled by a vertical movement of the panel 3 at its rear side, i.e.by engagement with the lower end of the retaining hook 7 or another partof the panel 3. This proximity switch 12 of the rear locking device 5could also be used to activate the front locking device. Unlocking ofthe locking device 5 should be done electrically without involvement ofthe proximity switch 12, because upward movement of the retaining hook 7cannot be used for unlocking. Then, this is the movement that should beprevented by the locking device. A signal should thus be sent to thelocking device 5 to unlock, for example by activation of the operatingbutton, before the rear side of the panel 3 can be moved upwardly. FIGS.7-9 show another embodiment of the roof assembly. The retaining hook 7is now formed with a flange 7 b at the bottom of the reinforcement frame9, which flange 7 b extends substantially horizontally, or bettersubstantially parallel to the upper side of the panel 3 at thislocation, and towards the front of the roof assembly. The locking device5 is operating mechanically now and is pivotable around a substantiallyhorizontal transverse axis 13. The locking device 5 includes a shortupper leg 14 and a longer lower leg 15. The legs 14 and 15 are spaced ata distance so as to create a space 16 such that the flange 7 b of theretaining hook 7 can enter the space 16 between the legs 14, 15. Thelocking device 5 comprises a spring schematically indicated at 5 a,herein illustrated as a torsion spring (not shown) configured to bias(e.g. to pivot) the locking device 5 to its unlocking position, heresuch that the legs 14, 15 extend slightly upwardly in rearward direction(FIG. 9). Of course, the spring can take other forms such as but notlimited to spring(s) operable in tension or compression.

As FIG. 9 shows, the flange 7 b approaches the locking device 5 which ispositioned in its unlocking position. In FIG. 8, the flange 7 b entersthe space 16 between the legs 14, 15 in its downward and forwardmovement with the panel 3. It comes into engagement with the lower leg15 of the locking device. Upon further movement of the panel 3 andflange 7 b towards the closed position of the panel 3, the flange 7 benters the space 16 to a greater extent and pushes the leg 15downwardly, so that the locking device 5 is pivoted to its lockingposition, as shown in FIG. 7. In this locking position, the engagementbetween the longer lower leg 15 and the flange 7 b of the retaining hook7 at a position beyond the upper leg 14 prevents movement of the shorterleg 14 when the retaining hook 7 is moved upwardly, because movement ofthe lower leg 15 is hindered by the flange 7 b, which in turn ishindered by the upper leg 14 which moves less than the lower leg 15.Moving the panel 3 towards its open position is possible, as thecombined rearward and upward movement and/or tilting of the flange 7 bcan be followed by the locking device 5 when it moves back to itsunlocking position.

Of course, the retaining hook 7 may be shaped differently, andespecially the part engaging the lower leg 15 may also be a partseparate from the flange 7 b of the retaining hook 7. The legs 14, 15 donot have to extend parallel, and especially the lower leg 15 may haveall kind of shapes, as only the position where it engages the flange 7 bor other part is important.

FIGS. 10, 11 show another embodiment of the roof assembly having alocking device 5 at the front side of the roof opening 2. The lockingdevice 5 comprises one proximity switch, such as an actuating element orpush button 12 and a locking element in the form of two locking pins 11.The proximity switch 12 and locking pins 11 are connected to each otherthrough a transmission 17 such that a linear movement of the proximityswitch 12 is reversed and enlarged into a larger linear movement of thelocking pins 11 in an opposite direction. The transmission 17 comprisesa lever 18 for each locking pin 11. The levers 18 are pivotally andslidably connected to the push button 12 and locking pins 11, andbetween these pivot points 19, the levers have a fixed third pivot axis20 so as to create a short lever arm 21 next to the push button 12 and along lever arm 22 next to the locking pins 11. Torsion springs 23 biasthe levers to the unlocking position in which the locking pins 11 areretracted and the push button 12 in its outer position. A stop 24determines the outer position of the push button 12. Parts mounted onthe frame 6 guide the actuating and locking elements.

FIGS. 110a-11d illustrate the operation of this embodiment of thelocking device 5.

FIG. 11a shows the panel 3 approaching the closed position. Theretaining hook 7 here comprises two holes 7 a, one for each locking pin11. The push button 12 extends slightly beyond the locking pins 11.

In FIG. 11b the retaining hook 7 comes into contact with the push button12 before the locking pins 11 enter the holes 7 a of the retaining hook7.

In FIG. 11c the retaining hook 7 has pushed the push button 12 adistance inwardly and this inward movement of the push button isconverted by the levers 18 into a lager outward movement of the lockingpins 11 so that they enter into the holes 7 a with a greater speed thanthe retaining hook 7 moves forwardly. In FIG. 11c the panel 3 hasreached its forward position and the locking pins 11 have moved fullyinto the holes 7 a. The lower side of the holes 7 a are in engagementwith the lower side of the locking pins 11. The locking pins 11 fitloosely in the holes 7 a as there is room in the holes 7 a above thelocking pins 11. The pins 11 are guided securely so that an upward forceon the part of the locking pins 11 projecting into the holes 7 a doesnot affect an upward movement of the locking pins 11.

FIG. 11d show the panel front and the retaining hook 7 in an upwardlytilted venting position. The panel 3 and thus the retaining hook 7 hasslightly moved in vertical direction (downward (downwardly) when thepanel 3 is moved from its closed position, but this is allowed by theholes 7 a having a larger height than the locking pins 11.

From the foregoing it will be apparent that the invention provides anroof assembly and a vehicle fitted therewith, by means of whichundesirable upward movements of the panel in its closed position isprevented in an effective manner.

The invention is not limited to the above-described embodiment as shownin the drawing, which can be varied in several ways within the scope ofthe invention.

Although the subject matter has been described in language specific tostructural features and/or methodological acts, it is to be understoodthat the subject matter defined in the appended claims is notnecessarily limited to the specific features or acts described above ashas been held by the courts. Rather, the specific features and actsdescribed above are disclosed as example forms of implementing theclaims.

The invention claimed is:
 1. A roof assembly for a vehicle having a roofopening in a fixed roof portion, comprising: a stationary partconfigured to attach the roof assembly to the fixed roof portion, atleast one closing element movably supported by the stationary part andconfigured to move between a closed position to close the roof openingand an open position in which a rear of the closing element is raisedand the closing element is moved rearwardly, a locking device on thestationary part, the locking device movable between a locking positionand an unlocking position, the closing element being configured toactuate the locking device to move from the unlocking position to thelocking position when the closing element is moved to the closedposition, wherein the locking device is provided with an actuatingelement, a transmission, and a locking element, the locking elementbeing connected to the actuating element through said transmission, saidtransmission configured to convert a movement of the actuating elementby contact with the closing element into a movement of the lockingelement, wherein the locking element and the actuating element aremovable substantially parallel to forward movement of the closingelement, the transmission configured to reverse the movement of theactuating element into a larger movement of the locking element, and atleast a retaining hook configured to hook behind the locking device onthe stationary part in the closed position of the closing element toprovide a mechanical lock for the closing element in an upwarddirection.
 2. The roof assembly of claim 1, wherein the retaining hookis positioned at a front of the closing element, and the locking deviceis positioned at a front of the roof opening.
 3. The roof assembly ofclaim 2, and further comprising an operating mechanism to move theclosing element between open and closed positions, the operatingmechanism being configured to move the closing element to the closedposition with a downward and slightly forward movement.
 4. The roofassembly of claim 1, wherein the transmission includes a leverarrangement, wherein the actuating element is connected to a first leverarm and the locking element is connected to a second lever arm that islonger than the first lever arm.
 5. The roof assembly of claim 2,wherein the locking device is shaped and movable to allow entrance ofthe retaining hook when moving downwardly and forwardly to the closedposition, but to prevent a vertical upward movement of the retaininghook in the closed position of the closing element.
 6. The roof assemblyof claim 1, wherein the locking device comprises a spring configured tobias the locking device to its unlocking position.
 7. A vehiclecomprising: a fixed roof portion having a roof opening; a roof assembly,the roof assembly comprising: a stationary part configured to attach theroof assembly to the fixed roof portion; at least one closing elementmovably supported by the stationary part and configured to move betweena closed position to close the roof opening and an open position inwhich a rear of the closing element is raised and the closing element ismoved rearwardly; a locking device on the stationary part, the lockingdevice movable between a locking position and an unlocking position, theclosing element being configured to actuate the locking device to movefrom the unlocking position to the locking position when the closingelement is moved to the closed position, wherein the locking device isprovided with an actuating element, a transmission, and a lockingelement, the locking element being connected to the actuating elementthrough said transmission, said transmission configured to convert amovement of the actuating element by contact with the closing elementinto a movement of the locking element, wherein the locking element andthe actuating element are movable substantially parallel to forwardmovement of the closing element, the transmission configured to reversethe movement of the actuating element into a larger movement of thelocking element; and at least a retaining hook configured to hook behindthe locking device on the stationary part in the closed position of theclosing element to provide a mechanical lock for the closing element ina vertical direction.
 8. The vehicle of claim 7, wherein the retaininghook is positioned at a front of the closing element, and the lockingdevice is positioned at a front of the roof opening.
 9. The vehicle ofclaim 8, and further comprising an operating mechanism to move theclosing element between open and closed positions, the operatingmechanism being configured to move the closing element to the closedposition with a downward and slightly forward movement.
 10. The vehicleof claim 7, wherein the transmission includes a lever arrangement,wherein the actuating element is connected to a first lever arm and thelocking element is connected to a second lever arm that is longer thanthe first lever arm.
 11. The vehicle of claim 8, wherein the lockingdevice is shaped and movable to allow entrance of the retaining hookwhen moving downwardly and forwardly to the closed position, but toprevent a vertical upward movement of the retaining hook in the closedposition of the closing element.
 12. The vehicle of claim 7, wherein thelocking device comprises a spring configured to bias the locking deviceto its unlocking position.